Pulvepizing-machine



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` R. DGATES.

PULVERIZING MACHINE. No. 270,217. Patented Jan. 9,1883.

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R. D. GATES.

PULVERIZING MAGHINE.

nted Jan. 9,1883.

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(No Model.) 4 Sheets-Sheet 3.

VR.. D. GATES.

PULVEEIZING MACHINE. l

Patented Jan. 9, 1883.

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R. D. GATES.

PULVERIZING MACHINE.`

Patented Jan. 9, 1883.

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verizing-machine complete.

UNITED STATES PATENT OFFICE.

RYERSON D. GATES, OF CHICAGO, ILLINOIS.

PULvEalzlNe-M'ACHINE.

SPECIFICATION-formng part of Letters Patent No. 270,217, dated January 9, i883. Application filed August 10, 1882. (No model.)

To all whom it may-concern:

Beit known that 1RYERsoN D. GATES, a citizen ofthe United States, residing at Chicago, in the county of Cook and State ot' Illinois, have invented a new and useful Improvement iu Pulverizing-Machines, of which the following is a specifica-tion.

My invention relates to a pulverizingmachine comprising pulverizing-rollers,atoothed driving-wheel, pinion gear-Wheels on the shafts ofthe rollers, an external surrounding and inclosing case, inclosed external separatingscreen, inclosed elevator, and means for operating the said screen and elevator, as will be hereinafter described and claimed.

In the accompanying drawings I have represented four pairs of pulverizing-rollers inclosed within a cylindrical case, and these rollers are revolved in the directions indicated by the arrows l, by means of gearing which is specially described and claimed in another application for patent led by mein the United States Patent Ot'ce on the 7th day of August, 1882; or they may berevolved in the directions indicated by any other suitable gearing-for instance, by the gearing shown in Letters Patent No. 260,092, dated June27, 1882, issued to In the accompanying drawings, Figure 1 is an edge or end elevation of my improved pul- Fig. 2 is a vertical section of the same in the' line :v a: of Fig. l.` Figs. 3, 4, and 5 show a front longitudinal section and a plan view of a modified form of screencase and screen which may be cmployed in lieu of the screen-case and revolving screen shownin Figs. l and 2; and Figs. 6, 7, and 8 also show a front view, longitudinal section, and plan of another form of screen-case and screen which may be used in lieu of either of the forms shown in the other figures of the drawings. i

The inclosing-case A may be constructed in cylindrical form', and is provided with a feedopening, a, at top, and a discharge-opening, a', at bottom. The heads of the case may be removable and confined to the cylindrical part by screw-bolts 5 or the case may be formed of two half-sections, the same as in my aforesaid Patent No. 260,092. Within the case A one, two, three, or more pairs of grinding or pulverizing rollers, B B B2 B3, are applied, and between the three pairs B B B2 a parting chute-plate or sieve, b, of angular form, is applied, while between the three pairs B' B2 B3 two inclined chute-plates or sieves, b b?, are provided. rlhe shafts of the rollers are supported in bearings C, which are-applied upon brackets of thecase, and are provided With spring-pressureandscrew-adjustingappliances l), similar to those shown and describedin my aforesaid pending application, or those shown in my Patent No. 260,092; or they may be provided with any other appliances for the same purpose.

The gearing, consisting of au internallytoothed wheel, E, having a shaft-supporting spider within it, and pinion-wheels F F F2,`for driving the several pairs of rollers in the directions indicated by the arrows 1, will be the same as shown in my aforesaid pending application, and therefore need not be particularly described here. the rollers may be produced in any other suitable manner without departing from the invention which I claim under this application.

' To the bottom ot' the cylindrical case A a separating or screen case, G, is coupled by a tube, c, o r other suitable means. This case is providedwithachute-board, d, and a revolving tapering screen, H. It also is formed with ian inclined discharging-bottom, m, having a passage, z', through it, and with a passage, j, in its end opposite the receiving end, and beneath this passage j a chute, n, is provided.

The illustrated motions of- L is an elevator-spout, provided with ahopper, k, at its lower end, which communicates with the chute n, as indicated by the arrow 2. This elevator-spout has an endless elevator, K, of, usual construction, applied within it, as shown, and it is provided with an inclined conducting-chute portion, L', which leads into the hopper-like formation around the opening a of' the cylindrical case A, as shown. The elevator-belt, which is passed around pulleys l l, is revolved bya belt, u, which passes around the pulley l of the upper shaft of elevatorspout, and around a pulley, t, of the main shaft E', while the,revolving screen is revolved by a belt, s, which passes around a pulley, t', of

shaft, r. The shaft r has a bevel-wheel, fr?,

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on one of its ends, and this bevel-wheel gears with another bevel-wheel, p, on the shaft 'w of the revolving screen.

Instead of employing the revolving screen' H, a screencase,G,with areciprocatin g'screen, H', may be applied between the elevator-spout and the cylindrical case A. The screen-case G will be provided with a chute-board, ol, inclined .discharging-bottom m having passage t' in it.

It will also be provided with apassage,j, and chute n, as shown; but instead of the screen being revolved by a belt passed over the 'pulley-shaft it will be reciprocated by an eccentric,

y, and connecting-rod y', set in motion by a belt, s, passed around a pulley, r3, ot' a shaft, fw', having the eccentric applied to it; and, if desired, a screencase, G2, similar to the one shown in Figs. 1, 4, and 7, may be provided with a stationary screen, H2, which answers as a chute, atdz.

In operating with my improved pulverizer the substances are fed in at a, and conducted between the rollers and caused to descend into the revolving screen H, or upon the screen H or H2, as indicated by the arrows 2. The nely-pulverized substances arescreened through the meshes of the screen and pass into suitable receptacles, as indicated by the arrows 3, while the partially-ground or nnpulverized substances pass out of the end ofthe screen upon the chute n into the hopper 7c, and are elevated by the elevator K and deposited again-into the cylindrical case, and again passed between the rollers and over the surface of the screen H. Thus my pulverizer insures ne grinding of all the substances which pass through its rollers and the meshes of the screen H; and

the construction is such that the machine can be operated rapidly without any liabilityot' clogging the screening-surface.

The external screen may be employed between the roller-inclosing case and the elevator without being inclosed. or surrounded by the separating-chamber, there being proper vconducting chutes or spouts provided for conthe substances from one pair of rollers to another pair.

What I claim as my invention, and desire to secure by Letters Patent, is-

A pulverizing-machine comprising a toothed driving-wheel, a plurality of pulverizing-rollers, pinion gear-wheels on the shafts of the rollers, an external surrounding and inclosiug case for the rollers, inclosed external separating screen, inclosed elevator, and suitable means for operating said screen and'elevator, substantially as and for the purpose described.

RYERSON D. GATES.

Witnesses:

E. O. HAs'rEN, HARRY LAIRD. 

